CN218326798U

CN218326798U - Aluminum oxide production calandria structure

Info

Publication number: CN218326798U
Application number: CN202222483568.6U
Authority: CN
Inventors: 徐志
Original assignee: Chengdu Zhiyuan Mechanical Science & Technology Co ltd
Current assignee: Chengdu Zhiyuan Mechanical Science & Technology Co ltd
Priority date: 2022-09-20
Filing date: 2022-09-20
Publication date: 2023-01-17
Anticipated expiration: 2032-09-20

Abstract

The utility model discloses an alumina production calandria structure, which reduces the workload of workers on an alumina production line. A calandria structure for alumina production is formed by connecting a plurality of U-shaped pipelines, wherein each U-shaped pipeline is formed by connecting two straight pipes with an arc pipe through a connecting structure; the connecting structure comprises a clamping sleeve, a socket and a T-shaped sealing ring; the two clamping sleeves are respectively connected with the pipe orifice at one end of the straight pipe and the pipe orifice at one end of the arc pipe; the T-shaped sealing ring is arranged between the two sockets; the clamping sleeve clamps the socket, four bolt holes are formed in the clamping sleeve, and fastening is achieved through the bolts.

Description

Calandria structure for aluminum oxide production

Technical Field

The utility model relates to an aluminium oxide production facility technical field, concretely relates to aluminium oxide production calandria structure.

Background

The bayer process is now the most widely used global process for producing alumina products. The main process for producing alumina products by the bayer process is as follows: the bauxite is ground, pulped, decomposed, evaporated and roasted to obtain alumina, and in the process, alkali is added into the solution to control the alkali concentration in order to remove sodium carbonate and sodium sulfate.

The temperature of the evaporation process is about 200 ℃, and the corrosivity of alkali to the inner wall of the calandria pipeline is very strong at the temperature. Thus, the inner walls of the caustic neutralization back calandria become fouled, resulting in the need to open the calandria for cleaning almost every month.

The whole body of the calandria structure in the existing aluminum oxide production is of a cubic structure, namely, after a layer of calandria is laid on a plane, the calandria is laid from the vertical direction to the upper plane. The calandria structure is generally formed by a plurality of U-shaped pipelines; the U-shaped pipeline is formed by connecting two straight pipes with an arc pipe through an elliptical gasket flange. And the oval flange that fills up has twelve bolts, and the calandria dismouting is very troublesome, and oval flange that fills up can take place a little when long-term use or the calandria produces the little bending phenomenon simultaneously for bolt after the alkali corrodes is difficult to be opened, leads to calandria structure cleaning process, and is very big to the consuming of workman's labour.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an alumina production calandria structure has changed the connected mode who constitutes the U type pipeline of alumina production calandria to make calandria dismouting relative direction, reduce and consume to workman's labour.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a calandria structure for alumina production is formed by connecting a plurality of U-shaped pipelines, wherein each U-shaped pipeline is formed by connecting two straight pipes with an arc pipe through a connecting structure;

the connecting structure comprises a clamping sleeve, a socket and a T-shaped sealing ring; the two clamping sleeves are respectively connected with the pipe orifice at one end of the straight pipe and the pipe orifice at one end of the arc pipe;

the T-shaped sealing ring is arranged between the two sockets; the clamping sleeve clamps the socket, four bolt holes are formed in the clamping sleeve, and fastening is achieved through the bolts.

As a preferred technical scheme, T type sealing ring includes muscle portion and lip, and the lip is located muscle portion both sides respectively, and the sealed face on the lip is outer inclined plane, and it is respectively with the sealed conical surface interference fit of socket.

Preferably, the rib of the T-shaped sealing ring is located between the locating surfaces of the two sockets.

As a preferred technical scheme, the cutting ferrule is also provided with a stress detection groove.

As a preferred technical scheme, the bolt is a ball-type bolt.

Compared with the prior art, the utility model, have following beneficial effect a connection structure for playing the connection effect in the calandria is the flange structure that has high pressure self-tightening function, and its inside fluid pressure is big more (T type sealing ring elastic variable is no longer than yield limit σ s), and sealed effect is better, and the inside fluid of pipeline is difficult for revealing, can not corrode the bolt, just so light when dismouting calandria. Meanwhile, the connecting structure is only provided with four bolts, so that the disassembly and assembly workload is smaller. Therefore, the workload of workers on the alumina production line is greatly reduced.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Wherein the reference numerals are as follows: the device comprises a straight pipe 1, an arc pipe 2, a connecting structure 3, a socket 3-1, a T-shaped sealing ring 3-2, a rib part 3-2-1, a lip part 3-2-2, a clamping sleeve 3-3, a spherical bolt 3-4 and a stress detection groove 3-5.

Detailed Description

The utility model aims to overcome the defects of the prior art, provides an alumina production calandria structure, and is further described in detail by combining the embodiment.

Example 1

As shown in fig. 1 to 2, an alumina production calandria structure is formed by connecting a plurality of U-shaped pipelines, wherein each U-shaped pipeline is formed by connecting two straight pipes 1 with an arc pipe 2 through a connecting structure 3.

The connecting structure 3 is a high-pressure self-tightening flange and comprises a clamping sleeve 3-3, a socket 3-1 and a T-shaped sealing ring 3-2.

Specifically, two sockets 3-1 are arranged and are respectively arranged at one end of the straight pipe 1 and the pipe opening of the arc-shaped pipe 2 in an interference fit or welding mode. A T-shaped sealing ring 3-2 is located between the two sockets 3-1. The T-shaped sealing ring 3-2 comprises a rib part 3-2-1 and lips 3-2-2, wherein the lips 3-2-2 are respectively positioned at two sides of the rib part 3-2-1, and sealing surfaces on the lips 3-2-2 are outer inclined surfaces which are respectively in interference fit with sealing conical surfaces on the inner wall of the socket 3-1. The rib part 3-2-1 of the T-shaped sealing ring 3-2 is positioned between the positioning surfaces of the two sockets 3-1.

The rib part 3-2-1 of the T-shaped sealing ring 3-2 plays a role in positioning. The lip 3-2-2 of the T-shaped sealing ring 3-2 plays a role of high pressure self-tightening which keeps close contact with the sealing surface of the socket 3-1 under the action of internal fluid high pressure.

The number of the clamping sleeves 3-3 is two, and two bolt holes are respectively formed in the two clamping sleeves 3-3 (namely the whole connecting structure 3 only has four spherical bolts 3-4). After the two cutting sleeves 3-3 clamp the socket 3-1, the cutting sleeves 3-3 are tightly screwed by the spherical bolts 3-4, and the axes of the spherical bolts 3-4 are vertical to the axial direction of the socket 3-1, so that the assembly of the alumina calandria is completed. During assembly, the T-shaped sealing ring 3-2 is positioned in front of the two sockets 3-1, the spherical bolt 3-4 tensions the two clamping sleeves 3-3, and the pre-tightening force of the spherical bolt 3-4 is converted into an axial force for pressing the sealing ring and the sockets 3-1, so that the sockets 3-1 and the sealing ring form initial contact; and continuously increasing the pre-tightening force of the ball-type bolt 3-4 to generate proper linear contact force between the socket 3-1 and the sealing ring to form sealing.

In the embodiment, the clamping sleeve 3-3 is further provided with the stress detection groove 3-5, so that the initial pretightening force can be conveniently measured through the detection groove, and the required pretightening force can be accurately set as required, thereby reducing the deformation of the sealing ring and prolonging the service life.

In this embodiment, the connection structure 3 for connecting in the calandria is a flange structure with a high-pressure self-tightening function, the larger the internal fluid pressure (the elastic variable of the T-shaped sealing ring 3-2 is not more than the yield limit σ s), the better the sealing effect, the fluid inside the pipeline is not easy to leak, the bolts cannot be corroded, and the calandria can be disassembled and assembled more easily. Meanwhile, the connecting structure 3 is only provided with four bolts, so that the workload of dismounting is smaller. Therefore, the structure of the application greatly reduces the workload of workers on an alumina production line.

According to the above embodiment, the present invention can be well implemented. It is worth to say that, on the premise of the above structural design, in order to solve the same technical problem, even if some insubstantial changes or retouching are made in the utility model, the essence of the adopted technical scheme is still the same as the utility model, so it should be in the protection scope of the utility model.

Claims

1. The aluminum oxide production calandria structure is characterized by being formed by connecting a plurality of U-shaped pipelines, wherein the U-shaped pipelines are formed by connecting two straight pipes with arc pipes through connecting structures;

2. The alumina production calandria structure of claim 1 wherein the T-shaped sealing ring comprises a rib and a lip, the lip is located on each side of the rib, and the sealing surface on the lip is an outer bevel that is in interference fit with the sealing cone of the socket.

3. An alumina production gauntlet structure according to claim 2, characterized in that the bead of the T-shaped sealing ring is located between the locating surfaces of the two sockets.

4. The alumina production calandria structure of claim 1 wherein the clamping sleeve is further provided with a stress detection groove.

5. An alumina production gauntlet structure according to claim 1, characterized in that the bolts are ball bolts.